CN209990478U

CN209990478U - Novel oil well ultrasonic blockage removal piezoelectric ceramic transducer

Info

Publication number: CN209990478U
Application number: CN201920266221.1U
Authority: CN
Inventors: 董世民; 张超; 柳青扬; 张敬祥; 刘天明
Original assignee: Yanshan University
Current assignee: Yanshan University
Priority date: 2019-03-04
Filing date: 2019-03-04
Publication date: 2020-01-24
Anticipated expiration: 2029-03-04

Abstract

The utility model discloses an oil well supersound removes stifled piezoceramics transducer belongs to the stifled increase production instrument of removing in pit in oil field increase production field. The transducer mainly comprises an upper rotating body, a lower rotating body, a piezoelectric ceramic ring, a sleeve, a ceramic support ring, a rubber support ring, an upper expansion sleeve, a lower expansion sleeve, an upper end cover and a lower end cover; the rotating body and the expansion sleeve are sleeved; one end of the rotating body is in threaded connection with the end cover; the piezoelectric ceramic ring, the ceramic support ring and the expansion sleeve are in transition fit; a rubber support ring is arranged between the piezoelectric ceramic ring and the ceramic support ring; a certain gap is reserved between the ceramic support ring and the sleeve. The transducer introduces the piezoelectric ceramic ring group, solves the problem of insufficient strength of large-size piezoelectric ceramic, reduces the influence of axial force on radial vibration by the aid of the rubber support ring arranged between the piezoelectric ceramic ring and the ceramic support ring, achieves adjustable bidirectional pretightening force on the piezoelectric ceramic ring through the designed internal-expansion external-pressure type mechanism, and improves power density of the piezoelectric ceramic.

Description

Novel oil well ultrasonic blockage removal piezoelectric ceramic transducer

Technical Field

The utility model relates to an oil field output increasing field specifically is novel stifled piezoceramics transducer is separated to oil well supersound.

Background

In oil production operation of oil and gas fields, the phenomenon of oil layer blockage can inevitably occur. This phenomenon must be removed by a plug removal device to recover the oil recovery operation. At present, the blockage removal mode mainly comprises a physical method and a chemical method. The existing device has the defects of complex structure, easy secondary pollution to an oil layer, low blockage removal efficiency and the like, and influences the oil extraction efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a simple structure, convenient operation and can realize the novel stifled piezoceramics transducer is separated to oil well supersound of adjustable pre-pressure. The device can produce high-power, the relatively lower ultrasonic wave of frequency, acts on through the mechanical action of ultrasonic wave, cavitation, thermal action etc. and blocks up the oil reservoir to effectively unblock.

In order to realize the purpose, the utility model discloses a technical scheme is: the ultrasonic blockage removing piezoelectric ceramic transducer for the oil well consists of an upper rotating body, an upper end cover, an upper expansion sleeve, a piezoelectric ceramic ring, a ceramic support ring, a sleeve, a rubber support ring, a set screw, a lower expansion sleeve, a lower rotating body and a lower end cover; the method is characterized in that: the upper rotating body is sleeved with the upper expansion sleeve; one end of the upper rotating body is in threaded connection with the upper end cover; the piezoelectric ceramic ring, the ceramic support ring and the expansion sleeve are in transition fit; a rubber support ring is arranged between the piezoelectric ceramic ring and the ceramic support ring; the piezoelectric ceramic ring and the sleeve are in interference fit; a certain gap is reserved between the ceramic support ring and the sleeve; the lower rotating body is sleeved with the lower expansion sleeve; one end of the lower rotating body is in threaded connection with the lower end cover. The piezoelectric ceramic ring set is formed by arranging the piezoelectric ceramic rings along the axial direction. The upper rotating body, the lower rotating body, the upper expanding sleeve, the lower expanding sleeve and the sleeve form an internal expanding and external pressing type mechanism.

The utility model discloses stifled piezoceramics transducer is separated to oil well supersound uses the spanner to rotate upper and lower rotator in the use, makes its outside removal, gives the cover that expands and radially moves to the pretightning force in the outside. The stainless steel sleeve and the piezoelectric ceramic ring are in interference fit through a temperature difference method, so that bidirectional pretightening force is provided for the piezoelectric ceramic ring. The special transmission cable transmits alternating current signals of the aboveground high-power ultrasonic power supply to the transducer. The piezoelectric ceramic ring realizes periodic radial vibration, and transmits sound signals outwards through the stainless steel sleeve, so that the blockage removing effect is achieved.

The utility model discloses stifled piezoceramics transducer is separated to oil well supersound compares with prior art's advantage: the structure is simple, and the operation is convenient; the piezoelectric ceramic ring group is adopted, so that the requirement of high-power sound waves is met, and the defect of low strength of a large-size piezoelectric ceramic element is overcome; a rubber support ring is arranged between the piezoelectric ceramic ring and the ceramic support ring, so that the influence of axial force on radial vibration is further reduced; the designed internal-expansion external-pressure type mechanism is utilized to realize the bidirectional pretightening force to the piezoelectric ceramic ring, and the power density of the piezoelectric ceramic is greatly improved.

Drawings

Fig. 1 is a schematic structural diagram of the ultrasonic blockage removing piezoelectric ceramic transducer for the oil well. In the figure: 1. the device comprises an upper rotating body, 2. an upper end cover, 3. an upper expansion sleeve, 4. a piezoelectric ceramic ring, 5. a ceramic support ring, 6. a sleeve, 7. a rubber support ring, 8. a set screw, 9. a lower expansion sleeve, 10. a lower rotating body and 11. a lower end cover.

Fig. 2 is a schematic structural diagram of the piezoelectric ceramic ring and the sleeve of the ultrasonic blockage removing piezoelectric ceramic transducer for the oil well of the utility model. In the figure: 1. the piezoelectric ceramic bearing comprises an upper rotating body, 3. an upper expansion sleeve, 4. a piezoelectric ceramic ring, 5. a ceramic support ring and 6. a sleeve.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

as shown in figure 1, the utility model discloses oil well supersound unblock piezoceramics transducer mainly comprises last rotation 1, upper end cover 2, the cover that expands 3, piezoceramics ring 4, ceramic support ring 5, sleeve 6, rubber support ring 7, holding screw 8, lower cover 9 that expands, lower rotation 10, lower end cover 11, last rotation 1 and the cover that expands 3 suit, and last rotation 1 one end is through threaded connection upper end cover 2, piezoceramics ring 4,

The ceramic support ring 5, the rubber support ring 7 and the expansion sleeves 3 and 9 are in transition fit, the sleeve is sleeved on the expansion sleeve, the sleeve 6 and the piezoelectric ceramic ring are in interference fit at 4 positions, the sleeve is sleeved by using a temperature difference method, the lower rotator 10 and the lower expansion sleeve 9 are sleeved, one end of the lower rotator 10 is connected with the lower end cover 11 through threads, and the sleeve 6 is tightly fixed on the end covers 2 and 11 through the set screw 8. The two-way pretightning force that cover 3, 9 and sleeve 6 provided expand can improve piezoceramics's power density, and sleeve 6 can play and enlarge sound wave intensity, protects inner structure's effect.

When the novel oil well ultrasonic blockage removing piezoelectric ceramic transducer is actually used, the novel oil well ultrasonic blockage removing piezoelectric ceramic transducer is placed to a blocked oil layer through a special transmission cable and a steel wire rope, after a high-power ultrasonic power supply on the well is switched on, a piezoelectric ceramic ring (4) converts an electric signal into periodic vibration along the radial direction to generate an acoustic signal, and the acoustic signal is transmitted to the blocked oil layer through a sleeve (6) in interference fit with the piezoelectric ceramic ring to effectively remove blockage.

Claims

1. The ultrasonic blockage removing piezoelectric ceramic transducer for the oil well comprises an upper rotating body (1), an upper end cover (2), an upper expansion sleeve (3), a piezoelectric ceramic ring (4), a ceramic support ring (5), a sleeve (6), a rubber support ring (7), a set screw (8), a lower expansion sleeve (9), a lower rotating body (10) and a lower end cover (11); the method is characterized in that: the upper rotating body (1) is sleeved with the upper expansion sleeve (3); one end of the upper rotating body (1) is in threaded connection with the upper end cover (2); the piezoelectric ceramic ring (4), the ceramic support ring (5) and the expansion sleeves (3, 9) are in transition fit; a rubber support ring (7) is arranged between the piezoelectric ceramic ring (4) and the ceramic support ring (5); the piezoelectric ceramic ring (4) and the sleeve (6) are in interference fit; a certain gap is reserved between the ceramic support ring (5) and the sleeve (6); the lower rotating body (10) is sleeved with the lower expansion sleeve (9); one end of the lower rotating body (10) is in threaded connection with the lower end cover (11).

2. The oil well ultrasonic unplugging piezoelectric ceramic transducer of claim 1, wherein: a piezoelectric ceramic ring group is adopted, and the piezoelectric ceramic ring group is formed by arranging piezoelectric ceramic rings (4) along the axial direction.

3. The oil well ultrasonic unplugging piezoelectric ceramic transducer of claim 1, wherein: the internal expansion and external compression mechanism is composed of the upper rotating body (1), the lower rotating body (10), the upper expansion sleeve (3), the lower expansion sleeve (9) and the sleeve (6).